1/*
2 * Copyright (C) 2015 Rob Clark <robclark@freedesktop.org>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 *
23 * Authors:
24 *    Rob Clark <robclark@freedesktop.org>
25 */
26
27#include "util/ralloc.h"
28#include "util/hash_table.h"
29
30#include "ir3_cache.h"
31#include "ir3_gallium.h"
32
33
34static uint32_t
35key_hash(const void *_key)
36{
37	const struct ir3_cache_key *key = _key;
38	uint32_t hash = _mesa_fnv32_1a_offset_bias;
39	hash = _mesa_fnv32_1a_accumulate_block(hash, key, sizeof(*key));
40	return hash;
41}
42
43static bool
44key_equals(const void *_a, const void *_b)
45{
46	const struct ir3_cache_key *a = _a;
47	const struct ir3_cache_key *b = _b;
48	// TODO we could optimize the key shader-variant key comparison by not
49	// ignoring has_per_samp.. not really sure if that helps..
50	return memcmp(a, b, sizeof(struct ir3_cache_key)) == 0;
51}
52
53struct ir3_cache {
54	/* cache mapping gallium/etc shader state-objs + shader-key to backend
55	 * specific state-object
56	 */
57	struct hash_table *ht;
58
59	const struct ir3_cache_funcs *funcs;
60	void *data;
61};
62
63struct ir3_cache * ir3_cache_create(const struct ir3_cache_funcs *funcs, void *data)
64{
65	struct ir3_cache *cache = rzalloc(NULL, struct ir3_cache);
66
67	cache->ht = _mesa_hash_table_create(cache, key_hash, key_equals);
68	cache->funcs = funcs;
69	cache->data = data;
70
71	return cache;
72}
73
74void ir3_cache_destroy(struct ir3_cache *cache)
75{
76	/* _mesa_hash_table_destroy is so *almost* useful.. */
77	hash_table_foreach(cache->ht, entry) {
78		cache->funcs->destroy_state(cache->data, entry->data);
79	}
80
81	ralloc_free(cache);
82}
83
84struct ir3_program_state *
85ir3_cache_lookup(struct ir3_cache *cache, const struct ir3_cache_key *key,
86		struct pipe_debug_callback *debug)
87{
88	uint32_t hash = key_hash(key);
89	struct hash_entry *entry =
90		_mesa_hash_table_search_pre_hashed(cache->ht, hash, key);
91
92	if (entry) {
93		return entry->data;
94	}
95
96	struct ir3_shader_variant *bs = ir3_shader_variant(key->vs, key->key, true, debug);
97	struct ir3_shader_variant *vs = ir3_shader_variant(key->vs, key->key, false, debug);
98	struct ir3_shader_variant *fs = ir3_shader_variant(key->fs, key->key, false, debug);
99
100	if (!bs || !vs || !fs) {
101		return NULL;
102	}
103
104	struct ir3_program_state *state =
105		cache->funcs->create_state(cache->data, bs, vs, fs, &key->key);
106	state->key = *key;
107
108	/* NOTE: uses copy of key in state obj, because pointer passed by caller
109	 * is probably on the stack
110	 */
111	_mesa_hash_table_insert_pre_hashed(cache->ht, hash, &state->key, state);
112
113	return state;
114}
115
116/* call when an API level state object is destroyed, to invalidate
117 * cache entries which reference that state object.
118 */
119void ir3_cache_invalidate(struct ir3_cache *cache, void *stobj)
120{
121	hash_table_foreach(cache->ht, entry) {
122		const struct ir3_cache_key *key = entry->key;
123		if ((key->fs == stobj) || (key->vs == stobj)) {
124			cache->funcs->destroy_state(cache->data, entry->data);
125			_mesa_hash_table_remove(cache->ht, entry);
126			return;
127		}
128	}
129}
130